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JVP 26(3) September 2006—ABSTRACTS
Neoceti Symposium, Saturday 8:45 acid-prepared osteolepiforms Medoevia and Gogonasus has offered strong support for BODY SIZE AND CRYPTIC TROPHIC SEPARATION OF GENERALIZED Jarvik’s interpretation, but Eusthenopteron itself has not been reexamined in detail. PIERCE-FEEDING CETACEANS: THE ROLE OF FEEDING DIVERSITY DUR- Uncertainty has persisted about the relationship between the large endoskeletal “fenestra ING THE RISE OF THE NEOCETI endochoanalis” and the apparently much smaller choana, and about the occlusion of upper ADAM, Peter, Univ. of California, Los Angeles, Los Angeles, CA; JETT, Kristin, Univ. of and lower jaw fangs relative to the choana. California, Davis, Davis, CA; OLSON, Joshua, Univ. of California, Los Angeles, Los A CT scan investigation of a large skull of Eusthenopteron, carried out in collaboration Angeles, CA with University of Texas and Parc de Miguasha, offers an opportunity to image and digital- Marine mammals with homodont dentition and relatively little specialization of the feeding ly “dissect” a complete three-dimensional snout region. We find that a choana is indeed apparatus are often categorized as generalist eaters of squid and fish. However, analyses of present, somewhat narrower but otherwise similar to that described by Jarvik. It does not many modern ecosystems reveal the importance of body size in determining trophic parti- receive the anterior coronoid fang, which bites mesial to the edge of the dermopalatine and tioning and diversity among predators. We established relationships between body sizes of is received by a pit in that bone. The fenestra endochoanalis is partly floored by the vomer extant cetaceans and their prey in order to infer prey size and potential trophic separation of and the dermopalatine, restricting the choana to the lateral part of the fenestra. -
Crinoidea, Echinodermata) from Poland
Title: Uncovering the hidden diversity of Mississippian crinoids (Crinoidea, Echinodermata) from Poland Author: Mariusz A. Salamon, William I. Ausich, Tomasz Brachaniec, Bartosz J. Płachno, Przemysław Gorzelak Citation style: Salamon Mariusz A., Ausich William I., Brachaniec Tomasz, Płachno Bartosz J., Gorzelak Przemysław. (2020). Uncovering the hidden diversity of Mississippian crinoids (Crinoidea, Echinodermata) from Poland. "PeerJ" Vol. 8 (2020), art. no e10641, doi 10.7717/peerj.10641 Uncovering the hidden diversity of Mississippian crinoids (Crinoidea, Echinodermata) from Poland Mariusz A. Salamon1, William I. Ausich2, Tomasz Brachaniec1, Bartosz J. Pªachno3 and Przemysªaw Gorzelak4 1 Faculty of Natural Sciences, Institute of Earth Sciences, University of Silesia in Katowice, Sosnowiec, Poland 2 School of Earth Sciences, Ohio State University, Columbus, OH, United States of America 3 Faculty of Biology, Institute of Botany, Jagiellonian University in Kraków, Cracow, Poland 4 Institute of Paleobiology, Polish Academy of Sciences, Poland, Warsaw, Poland ABSTRACT Partial crinoid crowns and aboral cups are reported from the Mississippian of Poland for the first time. Most specimens are partially disarticulated or isolated plates, which prevent identification to genus and species, but regardless these remains indicate a rich diversity of Mississippian crinoids in Poland during the Mississippian, especially during the late Viséan. Lanecrinus? sp. is described from the late Tournaisian of the D¦bnik Anticline region. A high crinoid biodiversity occurred during late Viséan of the Holy Cross Mountains, including the camerate crinoids Gilbertsocrinus? sp., Platycrinitidae Indeterminate; one flexible crinoid; and numerous eucladid crinoids, including Cyathocrinites mammillaris (Phillips), three taxa represented by partial cups left in open nomenclature, and numerous additional taxa known only from isolated radial plates, brachial plates, and columnals. -
Goniopholididae) from the Albian of Andorra (Teruel, Spain): Phylogenetic Implications
Journal of Iberian Geology 41 (1) 2015: 41-56 http://dx.doi.org/10.5209/rev_JIGE.2015.v41.n1.48654 www.ucm.es /info/estratig/journal.htm ISSN (print): 1698-6180. ISSN (online): 1886-7995 New material from a huge specimen of Anteophthalmosuchus cf. escuchae (Goniopholididae) from the Albian of Andorra (Teruel, Spain): Phylogenetic implications E. Puértolas-Pascual1,2*, J.I. Canudo1,2, L.M. Sender2 1Grupo Aragosaurus-IUCA, Departamento de Ciencias de la Tierra, Facultad de Ciencias, Universidad de Zaragoza, c/Pedro Cerbuna 12, 50009 Zaragoza, Spain. 2Departamento de Ciencias de la Tierra, Facultad de Ciencias, Universidad de Zaragoza, c/Pedro Cerbuna No. 12, 50009 Zaragoza, Spain. e-mail addresses: [email protected] (E.P.P, *corresponding author); [email protected] (J.I.C.); [email protected] (L.M.S.) Received: 15 December 2013 / Accepted: 18 December 2014 / Available online: 25 March 2015 Abstract In 2011 the partial skeleton of a goniopholidid crocodylomorph was recovered in the ENDESA coal mine Mina Corta Barrabasa (Escu- cha Formation, lower Albian), located in the municipality of Andorra (Teruel, Spain). This new goniopholidid material is represented by abundant postcranial and fragmentary cranial bones. The study of these remains coincides with a recent description in 2013 of at least two new species of goniopholidids in the palaeontological site of Mina Santa María in Ariño (Teruel), also in the Escucha Formation. These species are Anteophthalmosuchus escuchae, Hulkepholis plotos and an undetermined goniopholidid, AR-1-3422. In the present paper, we describe the postcranial and cranial bones of the goniopholidid from Mina Corta Barrabasa and compare it with the species from Mina Santa María. -
Confocal Raman Microscope Mapping As a Tool to Describe Different
Biogeosciences, 8, 3761–3769, 2011 www.biogeosciences.net/8/3761/2011/ Biogeosciences doi:10.5194/bg-8-3761-2011 © Author(s) 2011. CC Attribution 3.0 License. Confocal Raman microscope mapping as a tool to describe different mineral and organic phases at high spatial resolution within marine biogenic carbonates: case study on Nerita undata (Gastropoda, Neritopsina) G. Nehrke1 and J. Nouet2 1Alfred Wegener Institute for Polar and Marine Research, Am Handelshafen 12, 27570 Bremerhaven, Germany 2University Paris Sud, IDES UMR 8148, batimentˆ 504, campus universitaire, 91405 Orsay cedex, France Received: 20 May 2011 – Published in Biogeosciences Discuss.: 9 June 2011 Revised: 10 November 2011 – Accepted: 7 December 2011 – Published: 20 December 2011 Abstract. Marine biogenic carbonates formed by inverte- 1 Introduction brates (e.g. corals and mollusks) represent complex compos- ites of one or more mineral phases and organic molecules. Calcium carbonates formed by marine calcifying organisms This complexity ranges from the macroscopic structures ob- (e.g. corals and mollusks) received much attention in the field served with the naked eye down to sub micrometric struc- of biogeosciences during the last decades. On the one hand tures only revealed by micro analytical techniques. Under- they represent important proxy archives (e.g. oxygen isotopic standing to what extent and how organisms can control the composition can be used for temperature reconstruction (Mc- formation of these structures requires that the mineral and Crea, 1950; Urey et al., 1951)) and on the other hand they are organic phases can be identified and their spatial distribution affected by the increasing acidification of the ocean due to related. -
Review of the Mineralogy of Calcifying Sponges
Dickinson College Dickinson Scholar Faculty and Staff Publications By Year Faculty and Staff Publications 12-2013 Not All Sponges Will Thrive in a High-CO2 Ocean: Review of the Mineralogy of Calcifying Sponges Abigail M. Smith Jade Berman Marcus M. Key, Jr. Dickinson College David J. Winter Follow this and additional works at: https://scholar.dickinson.edu/faculty_publications Part of the Paleontology Commons Recommended Citation Smith, Abigail M.; Berman, Jade; Key,, Marcus M. Jr.; and Winter, David J., "Not All Sponges Will Thrive in a High-CO2 Ocean: Review of the Mineralogy of Calcifying Sponges" (2013). Dickinson College Faculty Publications. Paper 338. https://scholar.dickinson.edu/faculty_publications/338 This article is brought to you for free and open access by Dickinson Scholar. It has been accepted for inclusion by an authorized administrator. For more information, please contact [email protected]. © 2013. Licensed under the Creative Commons http://creativecommons.org/licenses/by- nc-nd/4.0/ Elsevier Editorial System(tm) for Palaeogeography, Palaeoclimatology, Palaeoecology Manuscript Draft Manuscript Number: PALAEO7348R1 Title: Not all sponges will thrive in a high-CO2 ocean: Review of the mineralogy of calcifying sponges Article Type: Research Paper Keywords: sponges; Porifera; ocean acidification; calcite; aragonite; skeletal biomineralogy Corresponding Author: Dr. Abigail M Smith, PhD Corresponding Author's Institution: University of Otago First Author: Abigail M Smith, PhD Order of Authors: Abigail M Smith, PhD; Jade Berman, PhD; Marcus M Key Jr, PhD; David J Winter, PhD Abstract: Most marine sponges precipitate silicate skeletal elements, and it has been predicted that they would be among the few "winners" in an acidifying, high-CO2 ocean. -
BGS Report, Single Column Layout
1 The Cretaceous Continental Intercalaire in central Algeria: subsurface evidence for a fluvial to aeolian 2 transition and implications for the onset of aridity on the Saharan Platform 3 A.J. Newella*, G.A. Kirbyb, J.P.R. Sorensena, A.E. Milodowskib 4 a British Geological Survey, Maclean Building, Wallingford, OX10 8BB, UK, email: [email protected] 5 b British Geological Survey, Nicker Hill, Keyworth, Nottingham, NG12 5GG, UK 6 * Corresponding author 7 Abstract 8 The Lower Cretaceous Continental Intercalaire of North Africa is a terrestrial to shallow marine 9 continental wedge deposited along the southern shoreline of the Neotethys Ocean. Today it has a wide 10 distribution across the northern Sahara where it has enormous socio-economic importance as a major 11 freshwater aquifer. During the Early Cretaceous major north-south trending basement structures were 12 reactivated in response to renewed Atlantic rifting and in Algeria, faults along the El Biod-Hassi 13 Messaourd Ridge appear to have been particularly important in controlling thickness patterns of the 14 Lower Cretaceous Continental Intercalaire. Subsurface data from the Krechba gas field in Central Algeria 15 shows that the Lower Cretaceous stratigraphy is subdivided into two clear parts. The lower part (here 16 termed the In Salah Formation) is a 200 m thick succession of alluvial deposits with large meandering 17 channels, clearly shown in 3D seismic, and waterlogged flood basins indicated by lignites and gleyed, 18 pedogenic mudstones. The overlying Krechba Formation is a 500 m thick succession of quartz- 19 dominated sands and sandstones whose microstructure indicates an aeolian origin, confirming earlier 20 observations from outcrop. -
Copertina Guida Ai TRILOBITI V3 Esterno
Enrico Bonino nato in provincia di Bergamo nel 1966, Enrico si è laureato in Geologia presso il Dipartimento di Scienze della Terra dell'Università di Genova. Attualmente risiede in Belgio dove svolge attività come specialista nel settore dei Sistemi di Informazione Geografica e analisi di immagini digitali. Curatore scientifico del Museo Back to the Past, ha pubblicato numerosi volumi di paleontologia in lingua italiana e inglese, collaborando inoltre all’elaborazione di testi e pubblicazioni scientifiche a livello nazonale e internazionale. Oltre alla passione per questa classe di artropodi, i suoi interessi sono orientati alle forme di vita vissute nel Precambriano, stromatoliti, e fossilizzazioni tipo konservat-lagerstätte. Carlo Kier nato a Milano nel 1961, Carlo si è laureato in Legge, ed è attualmente presidente della catena di alberghi Azul Hotel. Risiede a Cancun, Messico, dove si dedica ad attività legate all'ambiente marino. All'età di 16 anni, ha iniziato una lunga collaborazione con il Museo di Storia Naturale di Milano, ed è a partire dal 1970 che prese inizio la vera passione per i trilobiti, dando avvio a quella che oggi è diventata una delle collezioni paleontologiche più importanti al mondo. La sua instancabile attività di ricerca sul terreno in varie parti del globo e la collaborazione con professionisti del settore, ha permesso la descrizione di nuove specie di trilobiti ed artropodi. Una forte determinazione e la costruzione di un nuovo complesso alberghiero (AZUL Sensatori) hanno infine concretizzzato la realizzazione -
Invertebrate Ichnofossils from the Adamantina Formation (Bauru Basin, Late Cretaceous), Brazil
Rev. bras. paleontol. 9(2):211-220, Maio/Agosto 2006 © 2006 by the Sociedade Brasileira de Paleontologia INVERTEBRATE ICHNOFOSSILS FROM THE ADAMANTINA FORMATION (BAURU BASIN, LATE CRETACEOUS), BRAZIL ANTONIO CARLOS SEQUEIRA FERNANDES Departamento de Geologia e Paleontologia, Museu Nacional, UFRJ, Quinta da Boa Vista, São Cristóvão, 20940-040, Rio de Janeiro, RJ, Brazil. [email protected] ISMAR DE SOUZA CARVALHO Departamento de Geologia, Instituto de Geociências, UFRJ, 21949-900, Cidade Universitária, Rio de Janeiro, RJ, Brazil. [email protected] ABSTRACT – The Bauru Group is a sequence at least 300 m in thickness, of Cretaceous age (Turonian- Maastrichtian), located in southeastern Brazil (Bauru Basin), and consists of three formations, namely Adamantina, Uberaba and Marília. Throughout the Upper Cretaceous, there was an alternation between severely hot dry and rainy seasons, and a diverse fauna and flora was established in the basin. The ichnofossils studied were found in the Adamantina Formation outcrops and were identified as Arenicolites isp., ?Macanopsis isp., Palaeophycus heberti and Taenidium barretti, which reveal the burrowing behavior of the endobenthic invertebrates. There are also other biogenic structures such as plant root traces, coprolites and vertebrate fossil egg nests. The Adamantina Formation (Turonian-Santonian) is a sequence of fine sandstones, mudstones, siltstones and muddy sandstones, whose sediments are interpreted as deposited in exposed channel-bars and floodplains associated areas of braided fluvial environments. Key words: Bauru Basin, ichnofossils, late Cretaceous, continental palaeoenvironments, Adamantina Formation. RESUMO – O Grupo Bauru é uma seqüência de pelo menos 300 m de espessura, de idade cretácica (Turoniano- Maastrichtiano), localizada no Sudeste do Brasil (bacia Bauru), e consiste das formações Adamantina, Uberaba e Marília. -
Polymorphic Protective Dps–DNA Co-Crystals by Cryo Electron Tomography and Small Angle X-Ray Scattering
biomolecules Article Polymorphic Protective Dps–DNA Co-Crystals by Cryo Electron Tomography and Small Angle X-Ray Scattering Roman Kamyshinsky 1,2,3,* , Yury Chesnokov 1,2 , Liubov Dadinova 2, Andrey Mozhaev 2,4, Ivan Orlov 2, Maxim Petoukhov 2,5 , Anton Orekhov 1,2,3, Eleonora Shtykova 2 and Alexander Vasiliev 1,2,3 1 National Research Center “Kurchatov Institute”, Akademika Kurchatova pl., 1, 123182 Moscow, Russia; [email protected] (Y.C.); [email protected] (A.O.); [email protected] (A.V.) 2 Shubnikov Institute of Crystallography of Federal Scientific Research Centre “Crystallography and Photonics” of Russian Academy of Sciences, Leninskiy prospect, 59, 119333 Moscow, Russia; [email protected] (L.D.); [email protected] (A.M.); [email protected] (I.O.); [email protected] (M.P.); [email protected] (E.S.) 3 Moscow Institute of Physics and Technology, Institutsky lane 9, 141700 Dolgoprudny, Moscow Region, Russia 4 Shemyakin-Ovchinnikov Institute of bioorganic chemistry of Russian Academy of Sciences, Miklukho-Maklaya, 16/10, 117997 Moscow, Russia 5 Frumkin Institute of Physical Chemistry and Electrochemistry of Russian Academy of Sciences, Leninsky prospect, 31, 119071 Moscow, Russia * Correspondence: [email protected]; Tel.: +7-916-356-3963 Received: 6 November 2019; Accepted: 22 December 2019; Published: 26 December 2019 Abstract: Rapid increase of intracellular synthesis of specific histone-like Dps protein that binds DNA to protect the genome against deleterious factors leads to in cellulo crystallization—one of the most curious processes in the area of life science at the moment. However, the actual structure of the Dps–DNA co-crystals remained uncertain in the details for more than two decades. -
Enrollment and Coaptations in Some Species of the Ordovician Trilobite Genus Placoparia
Enrollment and coaptations in some sp eeies of the Ordovician trilobite genus Placoparia JEAN-LOUIS HENRY AND EUAN N.K. CLARKSON Henry, J.-L. & Clarkson, E.N.K. 1974 12 15: Enrollment and coaptations in some species of the Ordovician trilobite genus Placoparia. Fossils and Strata, No. 4, pp. 87-95. PIs. 1-3. Oslo ISSN 0300-949l. ISBN 82-00-04963-9. The species Pl. (Placoparia) cambriensis, Pl. (Coplacoparia ) tournemini and Pl. (Coplacoparia ) borni, described by Hammann (1971) from the Spanish Ordovician, are found in Brittany in formations attributed to the Llanvirn and the LIandeilo. The lateral borders of the librigenae of Pl. (Coplacoparia) tournemini and Pl. (Coplacoparia ) borni bear depressions into which the distal ends of the thoracic pleurae and the tips of the first pair of pygidial ribs come and fit during enrollment. These depressions, or coaptative structures sensu Cuenot (1919), are also to be observed in Pl. (Placoparia) zippei and Pl. (Hawleia) grandis, from the Ordovician of Bohemia. However, in the species tournemini and borni, additional depressions appear on the anterior cephalic border, and the coaptations evolve towards an increasing complexity. From Pl. (Placoparia) cambriensis, an ancestrai form with a wide geographic distribution, two distinct populations se em to have individu· alised by a process of allopatric speciation; one of these, probably neotenous, is represented by Pl. (Coplacoparia ) tournemini (Massif Armoricain and Iberian Peninsula), the other by Pl. (Placoparia ) zippei (Bohemia). Geo graphic isolation may be indirectly responsible for the appearance of new coaptative devices. jean-Louis Henry, Laboratoire de Paleontologie et de Stratigraphie, Institut de Geologie de l'Universite, B.P. -
When Beremendiin Shrews Disappeared in East Asia, Or How We Can Estimate Fossil Redeposition
Historical Biology An International Journal of Paleobiology ISSN: (Print) (Online) Journal homepage: https://www.tandfonline.com/loi/ghbi20 When beremendiin shrews disappeared in East Asia, or how we can estimate fossil redeposition Leonid L. Voyta , Valeriya E. Omelko , Mikhail P. Tiunov & Maria A. Vinokurova To cite this article: Leonid L. Voyta , Valeriya E. Omelko , Mikhail P. Tiunov & Maria A. Vinokurova (2020): When beremendiin shrews disappeared in East Asia, or how we can estimate fossil redeposition, Historical Biology, DOI: 10.1080/08912963.2020.1822354 To link to this article: https://doi.org/10.1080/08912963.2020.1822354 Published online: 22 Sep 2020. Submit your article to this journal View related articles View Crossmark data Full Terms & Conditions of access and use can be found at https://www.tandfonline.com/action/journalInformation?journalCode=ghbi20 HISTORICAL BIOLOGY https://doi.org/10.1080/08912963.2020.1822354 ARTICLE When beremendiin shrews disappeared in East Asia, or how we can estimate fossil redeposition Leonid L. Voyta a, Valeriya E. Omelko b, Mikhail P. Tiunovb and Maria A. Vinokurova b aLaboratory of Theriology, Zoological Institute, Russian Academy of Sciences, Saint Petersburg, Russia; bFederal Scientific Center of the East Asia Terrestrial Biodiversity, Far Eastern Branch of Russian Academy of Sciences, Vladivostok, Russia ABSTRACT ARTICLE HISTORY The current paper first time describes a small Beremendia from the late Pleistocene deposits in the Received 24 July 2020 Koridornaya Cave locality (Russian Far East), which associated with the extinct Beremendia minor. The Accepted 8 September 2020 paper is the first attempt to use a comparative analytical method to evaluate a possible case of redeposition KEYWORDS of fossil remains of this shrew. -
A New Euselachian Shark from the Early Permian of the Middle Urals, Russia
A new euselachian shark from the early Permian of the Middle Urals, Russia ALEXANDER O. IVANOV, CHRISTOPHER J. DUFFIN, and SERGE V. NAUGOLNYKH Ivanov , A.O., Duffin, C.J., and Naugolnykh, S.V. 2017. A new euselachian shark from the early Permian of the Middle Urals, Russia. Acta Palaeontologica Polonica 62 (2): 289–298. The isolated teeth of a new euselachian shark Artiodus prominens Ivanov and Duffin gen. et sp. nov. have been found in the Artinskian Stage (Early Permian) of Krasnoufimskie Klyuchiki quarry (Sverdlovsk Region, Middle Urals, Russia). The teeth of Artiodus possess a multicuspid orthodont crown with from four to nine triangular cusps; prominent labial projection terminating in a large round tubercle; distinct ornamentation from straight or recurved cristae; oval or semilu- nar, elongate, considerably vascularized base; dense vascular network formed of transverse horizontal, ascending, short secondary and semicircular canals. The teeth of the new taxon otherwise most closely resemble the teeth of some prot- acrodontid and sphenacanthid euselachians possessing a protacrodont-type crown, but differ from the teeth of all other known euselachians in the unique structure of the labial projection. The studied teeth vary in crown and base morphol- ogy, and three tooth morphotypes can be distinguished in the collection reflecting a moderate degree of linear gradient monognathic heterodonty. The range of morphologies otherwise displayed by the collection of teeth shows the greatest similarity to that described for the dentitions of relatively high-crowned hybodontids from the Mesozoic. The internal structure of the teeth, including their vascularization system is reconstructed using microtomography. The highest chon- drichthyan taxonomic diversity is found in the Artinskian, especially from the localities of the Middle and South Urals.